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avr32: Work around byteswap bug in gcc < 4.2
authorHaavard Skinnemoen <hskinnemoen@atmel.com>
Mon, 10 Mar 2008 11:56:12 +0000 (12:56 +0100)
committerHaavard Skinnemoen <hskinnemoen@atmel.com>
Mon, 10 Mar 2008 12:32:33 +0000 (13:32 +0100)
gcc versions earlier than 4.2 sign-extends the result of le16_to_cpu()
and friends when we implement __arch__swabX() using
__builtin_bswap_X(). Disable our arch-specific optimizations when those
gcc versions are being used.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

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